Design of cooling and heating sources of HVAC system is one of the main parts of green buildingdesign, as well as one of key measures to improve building energy efficiency and reduce environmentalimpact. In this paper, a LCA model for building cooling and heating source system is put forward and anintegrated index is given to describe the total environmental impact including energy consumption,resources consumption and pollutant emission through building life, in order to guide the design ofbuilding energy system.

Supermarket is common in China because of its convenience and abundant merchandise. People insupermarket can be classified into two categories: clients and operators. This research measures thetemperature and relative humidity of four supermarkets to describe the indoor thermal environment,investigates the satisfactory degree of clients and operators on the indoor environment, and analysesthe reasons of dissatisfaction.

Variation of discharge coefficients with wind direction and opening position is one of the main factorsdebasing accuracy of cross-ventilation flow rate prediction. The local dynamic similarity model wasdeveloped to solve this problem, and previous studies had validated it for inflow openings. In thepresent study, two experiments were carried out to investigate its validity for outflow openings.

As a series of our research on energy conservation and thermal comfort of detached houses havingcentralized HVAC systems, sensitivity analysis on feasibility of space cooling with outdoor air wasconducted using Design of Experiment(DOE). Effects of varied parameters on building thermal loadwere examined for five cities such as Tokyo and Osaka that have different weather conditions within themilder climate area of Japan.

District Heating and Cooling system (DHC) is an efficient energy system as they can supply chilled andheating water/steam effectively by integrating heating and cooling demand of neighboring buildings.However, there is possibility for further improvement of energy efficiency by integrated operation ofadjacent DHC and utilizing waste heat from municipal incinerators and CHPs. In this study, the effect ofsuch flexible use of heat and electricity in integrated DHC systems is examined. The main object is toraise total thermal efficiency and reduce CO2 emission.

Investigation of ventilation measurement method was carried out in a full-scale test house. The aim ofthis study was to examine the ventilation rate via human expiration. The adopted method is able tomeasure multi-zone airflow rates. Airflow rate between rooms was monitored and the outdoor airflowrate was measured by using the constant concentration tracer gases. The rate of outdoor airflowentering the house and the airflow rate between the rooms were estimated by the ventilationmeasurement method via human expiration based on system identification theory.

Sick building syndrome, which has become a major public concern in recent years, is caused in part byvolatile organic compounds (VOCs) emitted by building materials. In order to ensure the safety of ourenvironment, it is necessary to predict indoor VOCs concentrations over a long period of time.Long-term prediction of VOCs concentration requires the consideration of the influence of temperaturechanges, and there is a need for a simple prediction method that can be used for this purpose. Theprediction methods that have been proposed thus far, however, do not meet this requirement.

This paper report refers to an indoor thermal environment and energy-saving characteristics of asmall-scale nursing home in CHINO City, Nagano Prefecture, JAPAN (referred to as S nursing house)by means of measuring the temperature, humidity and electricity consumption. The city of CHINO, avery cold area in Japan, is allocated to Area II under the new energy-saving standard in Japan. Thishouse is built with the EWIS for reinforced concrete structure. To ensure higher thermal insulationperformance, the EPS boards with thickness of 300 mm are attached onto the wall building fromoutside.

In recent years, as a supplement for conventional large-scale power generation system, distributedenergy resources (DER) system has got more comprehensive attention. This is based on the visionthat future electric power system will not be built solely as centralized systems as they are today. It alsohelps to reduce the amount of transmission losses and grid investments. One possible alternative tothe traditional paradigm is the microgrid (?Grid), a localized network of DER system matched to localenergy demands.

Sweden is a country with a severe winter climate. Nevertheless, cooling during working hours is oftenrequired all year around in offices. Frequently passive chilled beams are used for providing additionalcooling. Often the chilled beams are installed above a false ceiling and thereby the room issubdivided into two compartments. From the chilled beam a plume is generated. Mock up air (returnair) is required to flow into the upper compartment to substitute the airflow generated by the chilledbeam. Therefore purpose provided openings are installed in the false ceiling.